#import builtins
#import __builtins__
#print(__dict__)
try:
    #b = 1
    #a = b+1
    int('abc')
except ValueError as e:
    print("valid number")
    print(e)
except NameError:
    print("variable is not exist")
else:
    print("everything is ok")
finally:
    print("alwanys  execute")
